Peer Establishment - iBGP
Assume that IP connectivity has been checked
Check TCP to find out what connections we are accepting
TCB Local Address Foreign Address (state)
005F2934 *.179 3.3.3.3.* LISTEN
0063F3D4 *.179 1.1.1.1.* LISTEN
We are listening for TCP connections for port 179 for the configured peering addresses only!
R2#debug ip tcp transactions
TCP special event debugging is on
TCP: sending RST, seq 0, ack 2500483296
TCP: sent RST to 4.4.4.4:26385 from 2.2.2.2:179
Remote is trying to open the session from 4.4.4.4 address …